Lock nut



May 29, 1945. 'G. E. R. SALEH LOCK NUT Filed Jan. 19, 1944 R mm NSM E Wm IM./%. H m 7 E L y .R B A G Lk /K/ l ATTORNEY Patented May 29, 1945 umrao STATES PATENT orrics' LOCK NUT Gabriel E. Rohmer Saleh, New York, N. y. Application January 19, 1944, Serial No. 519,075

2 Claims.

This invention relates to improvements in look nuts.

Broadly, it is an object of my invention to provide standard and other type of nuts with simple means, easily manufactured for effective and permanent locking of such nuts.

While lock nuts are not new and means of locking nuts as described herein and having my advantages has not been heretofore revealed in the patented art; I provide a plurality of partially threaded dowels made of plastic material or of ductile metals positioned adjacent the threaded bore of the nut within channels and so formed that when the nut is tightened inposition the dowel will be held under great and constant compression thus holding the nut firmly in place so that no vibration will loosen it.

For afuller understanding of the nature and objects of my invention, reference is had to the following detailed description in connectionwith the accompanying drawing, in which Fig. 1 isa longitudinal cross section of a nut provided with the dowels.

Fig. 2 is a plan view of the nut shown in Fig. 1.

Figs. 3 and 4 show dowels of different shape for use with the nut.

Fig. 5 shows an assembly of a nut and bolt with the dowels under compression.

Referring to the drawing, Fig. 1 shows a standard nut III with an interior thread II which may be of standard or special pitch. The nut I is provided with a plurality of channels 52 running parallel with the axis of the nut. Channels l2 extend almost to the top of the nut and stop at l3 as shown in Fig. 1. Dowels H, preferably made of ductile metal, such as lead, aluminum, copper and their alloys, are provided for channels 12 so that the dowels H when placed within the channels l2 also run parallel with the axis of the nut. Dowels H are provided with a plurality of fully cut threads H at the ends adjacent the base of the nut while the pitch of the thread varies and recedes, as shown in Fig. 3, until it merges at the inside diameter of the nut Hi.

When nut l0, containing dowels it wi hin channels I2, is tightened upon a bolt I5, the bolt l easily and freely enters the nut it! since the full threads of the dowels at the base of the nut eliminates any chance of stripping of the threads. As

the bolt i5 continues to enter the nut iii, the

ductile metal of dowels H are tightly wedged within channels l2 while the threads of the bolt I! cut deeper and additional threads in the dowels packing the ductile metal between the threads of the nut l0 and bolt l5. Since the channels I2 do not run through the nut, the ductile metal ofthe dowels H cannot be squeezed out at the top of the nut thus obtaining sufllcient compression to firmly lock the nut in position.

I prefer to locate dowels H at from each other as shown in Fig. 2, however, a greater or lesser number of dowels may be used.

Fi 4shows a modified dowel in the form oi a truncated cone. When this form is used, the channels in the nut are adapted to house and receive them.

The drawing in Fig. 5 reveals that when'the nut in is bolted in position upon bolt [5, the plate l6 forms a seat to prevent the dowel material from squeezing out although it is displaced by the threads of the bolt which cut full threads in the unthreaded and partially threaded portions of the dowels.- The dowel material is squeezed and compressed into any open space or wherever there may be play between the threads of the nut and bolt to provide a firm locking action, and is also carried on the. threads of the respective parts.

The dowels [4 may be placed within the channels l2 and held sufllciently tight so that the nuts can be stripped with the doweis in place for ready use.

Although a ductile metal is preferred, fiber materials and plastic compounds, or combinations of same, and like materials may be used for dowels.

It is obvious that various changes and modifications may be made in the details of construction without departing from the general spirit of the invention, as set forth in the appended claims.

I claim:

1. A lock nut of the character described having a plurality of blind cavities located in between the threaded and the outside portion of said nut and disposed parallel with the axis of said nut, dowels of ductile material securely fitted within the said cavities, said dowels not extending throughout the full height of the nut, said dowels having a series of threads only at their ends adjacent to the base of said nut, in coincidence with the threads of said nut, said dowels, above said series of threads extending into said threaded portion of the nut sufllciently so that the bolt upon which the nut is threaded will cut threads therein and in so doing will compress said dowels to completely fill the cavities and compact said dowels therein and against the threads of the bolt.

2. A look nut of the character described having a plurality of blind cavities located in between the threaded and the outside portion of said nut, dowels of ductile material securely fitted within the said cavities said dowels not extending throughout the full height of the nut, said dowels having a series of threads only at their ends adjacent to the base of said nut,-'in coincidence with the threads of said nut, said dowels, above said series of threads extending into said threaded portion of the nut sufllciently so that the bolt upon which the nut is threaded will cut threads therein and in so doing will compress said dowels to completely fill the cavities and compact said dowels therein and against the threads of the bolt.

GABRIEL E. ROI-IMER SALEH. 

